A puzzle has 80 pieces. Carlos has completed 60% of the puzzle. How many pieces of the puzzle has he put together?

Solve: 3x+y=6 4x-2y=18 show all work !

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)